| Tournament | Round | Karen Richards | Trevor Tao |
| 13.06.2011 Victorian Championship (VIC) | 11 | 399 | 355 |
| 02.09.2012 Australian Masters and State Team Challenge (NSW) | 14 | 458 | 451 |
| 10.03.2013 SA Championship (SA) | 3 | 473 | 391 |
| 08.03.2014 SA Championship (SA) | 7 | 465 | 411 |
| 08.03.2015 SA Championship (SA) | 9 | 375 | 403 |
| 07.08.2016 TRANS TASMAN (SA) | 17 | 398 | 400 |
| 10.09.2017 AMSC 2017 (SA) | 11 | 346 | 412 |
| 11.03.2023 SA Scrabble Champs (SA) | 7 | 351 | 427 |
| 09.03.2024 SA CHAMPS 2024 (SA) | 16 | 407 | 452 |
| Head-to-head after 9 games | 4 | 5 | |
| Average score | 408 | 411.33 | |
| Spread: | -30 | 30 | |